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|
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2017 by Blender Foundation.
* All rights reserved.
*/
/** \file
* \ingroup draw
*
* \brief DispList API for render engines
*
* \note DispList may be removed soon! This is a utility for object types that use render.
*/
#include "BLI_alloca.h"
#include "BLI_utildefines.h"
#include "BLI_edgehash.h"
#include "BLI_math_vector.h"
#include "DNA_curve_types.h"
#include "BKE_displist.h"
#include "GPU_batch.h"
#include "GPU_extensions.h"
#include "draw_cache_impl.h" /* own include */
static int dl_vert_len(const DispList *dl)
{
switch (dl->type) {
case DL_INDEX3:
case DL_INDEX4:
return dl->nr;
case DL_SURF:
return dl->parts * dl->nr;
}
return 0;
}
static int dl_tri_len(const DispList *dl)
{
switch (dl->type) {
case DL_INDEX3:
return dl->parts;
case DL_INDEX4:
return dl->parts * 2;
case DL_SURF:
return dl->totindex * 2;
}
return 0;
}
/* see: displist_get_allverts */
static int curve_render_surface_vert_len_get(const ListBase *lb)
{
int vert_len = 0;
for (const DispList *dl = lb->first; dl; dl = dl->next) {
vert_len += dl_vert_len(dl);
}
return vert_len;
}
static int curve_render_surface_tri_len_get(const ListBase *lb)
{
int tri_len = 0;
for (const DispList *dl = lb->first; dl; dl = dl->next) {
tri_len += dl_tri_len(dl);
}
return tri_len;
}
typedef void (SetTriIndicesFn)(void *thunk, uint v1, uint v2, uint v3);
static void displist_indexbufbuilder_set(
SetTriIndicesFn *set_tri_indices,
SetTriIndicesFn *set_quad_tri_indices, /* meh, find a better solution. */
void *thunk, const DispList *dl, const int ofs)
{
if (ELEM(dl->type, DL_INDEX3, DL_INDEX4, DL_SURF)) {
const int *idx = dl->index;
if (dl->type == DL_INDEX3) {
const int i_end = dl->parts;
for (int i = 0; i < i_end; i++, idx += 3) {
set_tri_indices(thunk, idx[0] + ofs, idx[2] + ofs, idx[1] + ofs);
}
}
else if (dl->type == DL_SURF) {
const int i_end = dl->totindex;
for (int i = 0; i < i_end; i++, idx += 4) {
set_quad_tri_indices(thunk, idx[0] + ofs, idx[2] + ofs, idx[1] + ofs);
set_quad_tri_indices(thunk, idx[2] + ofs, idx[0] + ofs, idx[3] + ofs);
}
}
else {
BLI_assert(dl->type == DL_INDEX4);
const int i_end = dl->parts;
for (int i = 0; i < i_end; i++, idx += 4) {
if (idx[2] != idx[3]) {
set_quad_tri_indices(thunk, idx[2] + ofs, idx[0] + ofs, idx[1] + ofs);
set_quad_tri_indices(thunk, idx[0] + ofs, idx[2] + ofs, idx[3] + ofs);
}
else {
set_tri_indices(thunk, idx[2] + ofs, idx[0] + ofs, idx[1] + ofs);
}
}
}
}
}
static int displist_indexbufbuilder_tess_set(
SetTriIndicesFn *set_tri_indices,
SetTriIndicesFn *set_quad_tri_indices, /* meh, find a better solution. */
void *thunk, const DispList *dl, const int ofs)
{
int v_idx = ofs;
if (ELEM(dl->type, DL_INDEX3, DL_INDEX4, DL_SURF)) {
if (dl->type == DL_INDEX3) {
for (int i = 0; i < dl->parts; i++) {
set_tri_indices(thunk, v_idx + 0, v_idx + 1, v_idx + 2);
v_idx += 3;
}
}
else if (dl->type == DL_SURF) {
for (int a = 0; a < dl->parts; a++) {
if ((dl->flag & DL_CYCL_V) == 0 && a == dl->parts - 1) {
break;
}
int b = (dl->flag & DL_CYCL_U) ? 0 : 1;
for (; b < dl->nr; b++) {
set_quad_tri_indices(thunk, v_idx + 0, v_idx + 1, v_idx + 2);
set_quad_tri_indices(thunk, v_idx + 3, v_idx + 4, v_idx + 5);
v_idx += 6;
}
}
}
else {
BLI_assert(dl->type == DL_INDEX4);
const int *idx = dl->index;
for (int i = 0; i < dl->parts; i++, idx += 4) {
if (idx[2] != idx[3]) {
set_quad_tri_indices(thunk, v_idx + 0, v_idx + 1, v_idx + 2);
set_quad_tri_indices(thunk, v_idx + 3, v_idx + 4, v_idx + 5);
v_idx += 6;
}
else {
set_tri_indices(thunk, v_idx + 0, v_idx + 1, v_idx + 2);
v_idx += 3;
}
}
}
}
return v_idx;
}
void DRW_displist_vertbuf_create_pos_and_nor(ListBase *lb, GPUVertBuf *vbo)
{
static GPUVertFormat format = { 0 };
static struct { uint pos, nor; } attr_id;
if (format.attr_len == 0) {
/* initialize vertex format */
attr_id.pos = GPU_vertformat_attr_add(&format, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
attr_id.nor = GPU_vertformat_attr_add(&format, "nor", GPU_COMP_I10, 4, GPU_FETCH_INT_TO_FLOAT_UNIT);
}
GPU_vertbuf_init_with_format(vbo, &format);
GPU_vertbuf_data_alloc(vbo, curve_render_surface_vert_len_get(lb));
BKE_displist_normals_add(lb);
int vbo_len_used = 0;
for (const DispList *dl = lb->first; dl; dl = dl->next) {
const bool ndata_is_single = dl->type == DL_INDEX3;
if (ELEM(dl->type, DL_INDEX3, DL_INDEX4, DL_SURF)) {
const float *fp_co = dl->verts;
const float *fp_no = dl->nors;
const int vbo_end = vbo_len_used + dl_vert_len(dl);
while (vbo_len_used < vbo_end) {
GPU_vertbuf_attr_set(vbo, attr_id.pos, vbo_len_used, fp_co);
if (fp_no) {
GPUPackedNormal vnor_pack = GPU_normal_convert_i10_v3(fp_no);
GPU_vertbuf_attr_set(vbo, attr_id.nor, vbo_len_used, &vnor_pack);
if (ndata_is_single == false) {
fp_no += 3;
}
}
fp_co += 3;
vbo_len_used += 1;
}
}
}
}
void DRW_displist_vertbuf_create_wiredata(ListBase *lb, GPUVertBuf *vbo)
{
static GPUVertFormat format = { 0 };
static struct { uint wd; } attr_id;
if (format.attr_len == 0) {
/* initialize vertex format */
if (!GPU_crappy_amd_driver()) {
/* Some AMD drivers strangely crash with a vbo with this format. */
attr_id.wd = GPU_vertformat_attr_add(&format, "wd", GPU_COMP_U8, 1, GPU_FETCH_INT_TO_FLOAT_UNIT);
}
else {
attr_id.wd = GPU_vertformat_attr_add(&format, "wd", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
}
}
int vbo_len_used = curve_render_surface_vert_len_get(lb);
GPU_vertbuf_init_with_format(vbo, &format);
GPU_vertbuf_data_alloc(vbo, vbo_len_used);
if (vbo->format.stride == 1) {
memset(vbo->data, 0xFF, (size_t)vbo_len_used);
}
else {
GPUVertBufRaw wd_step;
GPU_vertbuf_attr_get_raw_data(vbo, attr_id.wd, &wd_step);
for (int i = 0; i < vbo_len_used; i++) {
*((float *)GPU_vertbuf_raw_step(&wd_step)) = 1.0f;
}
}
}
void DRW_displist_indexbuf_create_triangles_in_order(ListBase *lb, GPUIndexBuf *ibo)
{
const int tri_len = curve_render_surface_tri_len_get(lb);
const int vert_len = curve_render_surface_vert_len_get(lb);
GPUIndexBufBuilder elb;
GPU_indexbuf_init(&elb, GPU_PRIM_TRIS, tri_len, vert_len);
int ofs = 0;
for (const DispList *dl = lb->first; dl; dl = dl->next) {
displist_indexbufbuilder_set(
(SetTriIndicesFn *)GPU_indexbuf_add_tri_verts,
(SetTriIndicesFn *)GPU_indexbuf_add_tri_verts,
&elb, dl, ofs);
ofs += dl_vert_len(dl);
}
GPU_indexbuf_build_in_place(&elb, ibo);
}
void DRW_displist_indexbuf_create_triangles_loop_split_by_material(
ListBase *lb,
GPUIndexBuf **ibo_mats, uint mat_len)
{
GPUIndexBufBuilder *elb = BLI_array_alloca(elb, mat_len);
const int tri_len = curve_render_surface_tri_len_get(lb);
/* Init each index buffer builder */
for (int i = 0; i < mat_len; i++) {
GPU_indexbuf_init(&elb[i], GPU_PRIM_TRIS, tri_len * 3, tri_len * 3);
}
/* calc each index buffer builder */
uint v_idx = 0;
for (const DispList *dl = lb->first; dl; dl = dl->next) {
v_idx = displist_indexbufbuilder_tess_set(
(SetTriIndicesFn *)GPU_indexbuf_add_tri_verts,
(SetTriIndicesFn *)GPU_indexbuf_add_tri_verts,
&elb[dl->col], dl, v_idx);
}
/* build each indexbuf */
for (int i = 0; i < mat_len; i++) {
GPU_indexbuf_build_in_place(&elb[i], ibo_mats[i]);
}
}
static void set_overlay_wires_tri_indices(void *thunk, uint v1, uint v2, uint v3)
{
GPUIndexBufBuilder *eld = (GPUIndexBufBuilder *)thunk;
GPU_indexbuf_add_line_verts(eld, v1, v2);
GPU_indexbuf_add_line_verts(eld, v2, v3);
GPU_indexbuf_add_line_verts(eld, v3, v1);
}
static void set_overlay_wires_quad_tri_indices(void *thunk, uint v1, uint v2, uint v3)
{
GPUIndexBufBuilder *eld = (GPUIndexBufBuilder *)thunk;
GPU_indexbuf_add_line_verts(eld, v1, v3);
GPU_indexbuf_add_line_verts(eld, v3, v2);
}
void DRW_displist_indexbuf_create_lines_in_order(ListBase *lb, GPUIndexBuf *ibo)
{
const int tri_len = curve_render_surface_tri_len_get(lb);
const int vert_len = curve_render_surface_vert_len_get(lb);
GPUIndexBufBuilder elb;
GPU_indexbuf_init(&elb, GPU_PRIM_LINES, tri_len * 3, vert_len);
int ofs = 0;
for (const DispList *dl = lb->first; dl; dl = dl->next) {
displist_indexbufbuilder_set(
(SetTriIndicesFn *)set_overlay_wires_tri_indices,
(SetTriIndicesFn *)set_overlay_wires_quad_tri_indices,
&elb, dl, ofs);
ofs += dl_vert_len(dl);
}
GPU_indexbuf_build_in_place(&elb, ibo);
}
static void surf_uv_quad(const DispList *dl, const uint quad[4], float r_uv[4][2])
{
int orco_sizeu = dl->nr - 1;
int orco_sizev = dl->parts - 1;
/* exception as handled in convertblender.c too */
if (dl->flag & DL_CYCL_U) {
orco_sizeu++;
}
if (dl->flag & DL_CYCL_V) {
orco_sizev++;
}
for (int i = 0; i < 4; i++) {
/* find uv based on vertex index into grid array */
r_uv[i][0] = (quad[i] / dl->nr) / (float)orco_sizev;
r_uv[i][1] = (quad[i] % dl->nr) / (float)orco_sizeu;
/* cyclic correction */
if ((i == 1 || i == 2) && r_uv[i][0] == 0.0f) {
r_uv[i][0] = 1.0f;
}
if ((i == 0 || i == 1) && r_uv[i][1] == 0.0f) {
r_uv[i][1] = 1.0f;
}
}
}
static void displist_vertbuf_attr_set_tri_pos_nor_uv(
GPUVertBufRaw *pos_step, GPUVertBufRaw *nor_step, GPUVertBufRaw *uv_step,
const float v1[3], const float v2[3], const float v3[3],
const GPUPackedNormal *n1, const GPUPackedNormal *n2, const GPUPackedNormal *n3,
const float uv1[2], const float uv2[2], const float uv3[2])
{
if (pos_step->size != 0) {
copy_v3_v3(GPU_vertbuf_raw_step(pos_step), v1);
copy_v3_v3(GPU_vertbuf_raw_step(pos_step), v2);
copy_v3_v3(GPU_vertbuf_raw_step(pos_step), v3);
*(GPUPackedNormal *)GPU_vertbuf_raw_step(nor_step) = *n1;
*(GPUPackedNormal *)GPU_vertbuf_raw_step(nor_step) = *n2;
*(GPUPackedNormal *)GPU_vertbuf_raw_step(nor_step) = *n3;
}
if (uv_step->size != 0) {
normal_float_to_short_v2(GPU_vertbuf_raw_step(uv_step), uv1);
normal_float_to_short_v2(GPU_vertbuf_raw_step(uv_step), uv2);
normal_float_to_short_v2(GPU_vertbuf_raw_step(uv_step), uv3);
}
}
void DRW_displist_vertbuf_create_loop_pos_and_nor_and_uv(
ListBase *lb,
GPUVertBuf *vbo_pos_nor, GPUVertBuf *vbo_uv)
{
static GPUVertFormat format_pos_nor = { 0 };
static GPUVertFormat format_uv = { 0 };
static struct { uint pos, nor, uv; } attr_id;
if (format_pos_nor.attr_len == 0) {
/* initialize vertex format */
attr_id.pos = GPU_vertformat_attr_add(&format_pos_nor, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
attr_id.nor = GPU_vertformat_attr_add(&format_pos_nor, "nor", GPU_COMP_I10, 3, GPU_FETCH_INT_TO_FLOAT_UNIT);
GPU_vertformat_triple_load(&format_pos_nor);
/* UVs are in [0..1] range. We can compress them. */
attr_id.uv = GPU_vertformat_attr_add(&format_uv, "u", GPU_COMP_I16, 2, GPU_FETCH_INT_TO_FLOAT_UNIT);
}
int vbo_len_capacity = curve_render_surface_tri_len_get(lb) * 3;
GPUVertBufRaw pos_step = {0};
GPUVertBufRaw nor_step = {0};
GPUVertBufRaw uv_step = {0};
if (DRW_TEST_ASSIGN_VBO(vbo_pos_nor)) {
GPU_vertbuf_init_with_format(vbo_pos_nor, &format_pos_nor);
GPU_vertbuf_data_alloc(vbo_pos_nor, vbo_len_capacity);
GPU_vertbuf_attr_get_raw_data(vbo_pos_nor, attr_id.pos, &pos_step);
GPU_vertbuf_attr_get_raw_data(vbo_pos_nor, attr_id.nor, &nor_step);
}
if (DRW_TEST_ASSIGN_VBO(vbo_uv)) {
GPU_vertbuf_init_with_format(vbo_uv, &format_uv);
GPU_vertbuf_data_alloc(vbo_uv, vbo_len_capacity);
GPU_vertbuf_attr_get_raw_data(vbo_uv, attr_id.uv, &uv_step);
}
BKE_displist_normals_add(lb);
for (const DispList *dl = lb->first; dl; dl = dl->next) {
const bool is_smooth = (dl->rt & CU_SMOOTH) != 0;
if (ELEM(dl->type, DL_INDEX3, DL_INDEX4, DL_SURF)) {
const float(*verts)[3] = (float(*)[3])dl->verts;
const float(*nors)[3] = (float(*)[3])dl->nors;
const int *idx = dl->index;
float uv[4][2];
if (dl->type == DL_INDEX3) {
/* Currently 'DL_INDEX3' is always a flat surface with a single normal. */
const GPUPackedNormal pnor = GPU_normal_convert_i10_v3(dl->nors);
const float x_max = (float)(dl->nr - 1);
uv[0][1] = uv[1][1] = uv[2][1] = 0.0f;
const int i_end = dl->parts;
for (int i = 0; i < i_end; i++, idx += 3) {
if (vbo_uv) {
uv[0][0] = idx[0] / x_max;
uv[1][0] = idx[1] / x_max;
uv[2][0] = idx[2] / x_max;
}
displist_vertbuf_attr_set_tri_pos_nor_uv(
&pos_step, &nor_step, &uv_step,
verts[idx[0]], verts[idx[2]], verts[idx[1]],
&pnor, &pnor, &pnor,
uv[0], uv[2], uv[1]);
}
}
else if (dl->type == DL_SURF) {
uint quad[4];
for (int a = 0; a < dl->parts; a++) {
if ((dl->flag & DL_CYCL_V) == 0 && a == dl->parts - 1) {
break;
}
int b;
if (dl->flag & DL_CYCL_U) {
quad[0] = dl->nr * a;
quad[3] = quad[0] + dl->nr - 1;
quad[1] = quad[0] + dl->nr;
quad[2] = quad[3] + dl->nr;
b = 0;
}
else {
quad[3] = dl->nr * a;
quad[0] = quad[3] + 1;
quad[2] = quad[3] + dl->nr;
quad[1] = quad[0] + dl->nr;
b = 1;
}
if ((dl->flag & DL_CYCL_V) && a == dl->parts - 1) {
quad[1] -= dl->parts * dl->nr;
quad[2] -= dl->parts * dl->nr;
}
for (; b < dl->nr; b++) {
if (vbo_uv) {
surf_uv_quad(dl, quad, uv);
}
GPUPackedNormal pnors_quad[4];
if (is_smooth) {
for (int j = 0; j < 4; j++) {
pnors_quad[j] = GPU_normal_convert_i10_v3(nors[quad[j]]);
}
}
else {
float nor_flat[3];
normal_quad_v3(nor_flat, verts[quad[0]], verts[quad[1]], verts[quad[2]], verts[quad[3]]);
pnors_quad[0] = GPU_normal_convert_i10_v3(nor_flat);
pnors_quad[1] = pnors_quad[0];
pnors_quad[2] = pnors_quad[0];
pnors_quad[3] = pnors_quad[0];
}
displist_vertbuf_attr_set_tri_pos_nor_uv(
&pos_step, &nor_step, &uv_step,
verts[quad[2]], verts[quad[0]], verts[quad[1]],
&pnors_quad[2], &pnors_quad[0], &pnors_quad[1],
uv[2], uv[0], uv[1]);
displist_vertbuf_attr_set_tri_pos_nor_uv(
&pos_step, &nor_step, &uv_step,
verts[quad[0]], verts[quad[2]], verts[quad[3]],
&pnors_quad[0], &pnors_quad[2], &pnors_quad[3],
uv[0], uv[2], uv[3]);
quad[2] = quad[1];
quad[1]++;
quad[3] = quad[0];
quad[0]++;
}
}
}
else {
BLI_assert(dl->type == DL_INDEX4);
uv[0][0] = uv[0][1] = uv[1][0] = uv[3][1] = 0.0f;
uv[1][1] = uv[2][0] = uv[2][1] = uv[3][0] = 1.0f;
const int i_end = dl->parts;
for (int i = 0; i < i_end; i++, idx += 4) {
const bool is_tri = idx[2] != idx[3];
GPUPackedNormal pnors_idx[4];
if (is_smooth) {
int idx_len = is_tri ? 3 : 4;
for (int j = 0; j < idx_len; j++) {
pnors_idx[j] = GPU_normal_convert_i10_v3(nors[idx[j]]);
}
}
else {
float nor_flat[3];
if (is_tri) {
normal_tri_v3(nor_flat, verts[idx[0]], verts[idx[1]], verts[idx[2]]);
}
else {
normal_quad_v3(nor_flat, verts[idx[0]], verts[idx[1]], verts[idx[2]], verts[idx[3]]);
}
pnors_idx[0] = GPU_normal_convert_i10_v3(nor_flat);
pnors_idx[1] = pnors_idx[0];
pnors_idx[2] = pnors_idx[0];
pnors_idx[3] = pnors_idx[0];
}
displist_vertbuf_attr_set_tri_pos_nor_uv(
&pos_step, &nor_step, &uv_step,
verts[idx[0]], verts[idx[2]], verts[idx[1]],
&pnors_idx[0], &pnors_idx[2], &pnors_idx[1],
uv[0], uv[2], uv[1]);
if (idx[2] != idx[3]) {
displist_vertbuf_attr_set_tri_pos_nor_uv(
&pos_step, &nor_step, &uv_step,
verts[idx[2]], verts[idx[0]], verts[idx[3]],
&pnors_idx[2], &pnors_idx[0], &pnors_idx[3],
uv[2], uv[0], uv[3]);
}
}
}
}
}
/* Resize and finish. */
if (pos_step.size != 0) {
int vbo_len_used = GPU_vertbuf_raw_used(&pos_step);
if (vbo_len_used < vbo_len_capacity) {
GPU_vertbuf_data_resize(vbo_pos_nor, vbo_len_used);
}
}
if (uv_step.size != 0) {
int vbo_len_used = GPU_vertbuf_raw_used(&uv_step);
if (vbo_len_used < vbo_len_capacity) {
GPU_vertbuf_data_resize(vbo_uv, vbo_len_used);
}
}
}
/* Edge detection/adjecency */
#define NO_EDGE INT_MAX
static void set_edge_adjacency_lines_indices(EdgeHash *eh, GPUIndexBufBuilder *elb, bool *r_is_manifold, uint v1, uint v2, uint v3)
{
bool inv_indices = (v2 > v3);
void **pval;
bool value_is_init = BLI_edgehash_ensure_p(eh, v2, v3, &pval);
int v_data = POINTER_AS_INT(*pval);
if (!value_is_init || v_data == NO_EDGE) {
/* Save the winding order inside the sign bit. Because the
* edgehash sort the keys and we need to compare winding later. */
int value = (int)v1 + 1; /* Int 0 bm_looptricannot be signed */
*pval = POINTER_FROM_INT((inv_indices) ? -value : value);
}
else {
/* HACK Tag as not used. Prevent overhead of BLI_edgehash_remove. */
*pval = POINTER_FROM_INT(NO_EDGE);
bool inv_opposite = (v_data < 0);
uint v_opposite = (uint)abs(v_data) - 1;
if (inv_opposite == inv_indices) {
/* Don't share edge if triangles have non matching winding. */
GPU_indexbuf_add_line_adj_verts(elb, v1, v2, v3, v1);
GPU_indexbuf_add_line_adj_verts(elb, v_opposite, v2, v3, v_opposite);
*r_is_manifold = false;
}
else {
GPU_indexbuf_add_line_adj_verts(elb, v1, v2, v3, v_opposite);
}
}
}
static void set_edges_adjacency_lines_indices(void *thunk, uint v1, uint v2, uint v3)
{
void **packed = (void **)thunk;
GPUIndexBufBuilder *elb = (GPUIndexBufBuilder*)packed[0];
EdgeHash *eh = (EdgeHash *)packed[1];
bool *r_is_manifold = (bool*)packed[2];
set_edge_adjacency_lines_indices(eh, elb, r_is_manifold, v1, v2, v3);
set_edge_adjacency_lines_indices(eh, elb, r_is_manifold, v2, v3, v1);
set_edge_adjacency_lines_indices(eh, elb, r_is_manifold, v3, v1, v2);
}
void DRW_displist_indexbuf_create_edges_adjacency_lines(struct ListBase *lb, struct GPUIndexBuf *ibo, bool *r_is_manifold)
{
const int tri_len = curve_render_surface_tri_len_get(lb);
const int vert_len = curve_render_surface_vert_len_get(lb);
*r_is_manifold = true;
/* Allocate max but only used indices are sent to GPU. */
GPUIndexBufBuilder elb;
GPU_indexbuf_init(&elb, GPU_PRIM_LINES_ADJ, tri_len * 3, vert_len);
EdgeHash *eh = BLI_edgehash_new_ex(__func__, tri_len * 3);
/* pack values to pass to `set_edges_adjacency_lines_indices` function. */
void *thunk[3] = {&elb, eh, r_is_manifold};
int v_idx = 0;
for (const DispList *dl = lb->first; dl; dl = dl->next) {
displist_indexbufbuilder_set(
(SetTriIndicesFn *)set_edges_adjacency_lines_indices,
(SetTriIndicesFn *)set_edges_adjacency_lines_indices,
thunk, dl, v_idx);
v_idx += dl_vert_len(dl);
}
/* Create edges for remaning non manifold edges. */
EdgeHashIterator *ehi;
for (ehi = BLI_edgehashIterator_new(eh);
BLI_edgehashIterator_isDone(ehi) == false;
BLI_edgehashIterator_step(ehi))
{
uint v1, v2;
int v_data = POINTER_AS_INT(BLI_edgehashIterator_getValue(ehi));
if (v_data == NO_EDGE) {
continue;
}
BLI_edgehashIterator_getKey(ehi, &v1, &v2);
uint v0 = (uint)abs(v_data) - 1;
if (v_data < 0) { /* inv_opposite */
SWAP(uint, v1, v2);
}
GPU_indexbuf_add_line_adj_verts(&elb, v0, v1, v2, v0);
*r_is_manifold = false;
}
BLI_edgehashIterator_free(ehi);
BLI_edgehash_free(eh, NULL);
GPU_indexbuf_build_in_place(&elb, ibo);
}
#undef NO_EDGE
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